Fire main window can have the effect of fire protection, and fire is a steel frame window, fireproof glass and steel casement, etc, can effectively slow down the fire, to avoid the fire in. 

With fire window, will the level of fire prevention, the provisions of the state, fire window can be divided into ethylene-propylene levels, different fire rating, different fire time. B fire window can fire 1.5 hours, a fire window fire time is not less than 1 hour, and class c fire time not less than half an hour, so different levels of fire wear, its fire time is different also. At the same time when choosing fire window depending on the need to choose different levels of fire window. As used in the fire truck or a chemical plant to choose class a fire window, ordinary factory or office chose class c fire window.